Yahoo Finance

import requests

BASE = "https://query1.finance.yahoo.com"
HEADERS = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36"
}

def yahoo_session():
    """Retorna requests.Session con cookie A3 y crumb."""
    s = requests.Session()
    s.headers.update(HEADERS)
    s.get("https://fc.yahoo.com", timeout=10)
    crumb = s.get(f"{BASE}/v1/test/getcrumb", timeout=10).text.strip()
    s.params = {"crumb": crumb}
    return s

# Uso:
# s = yahoo_session()
# r = s.get("https://query1.finance.yahoo.com/v7/finance/quote?symbols=AAPL,MSFT")

import requests
headers = {"User-Agent": "Mozilla/5.0 (...) Chrome/120.0.0.0 Safari/537.36"}
r = requests.get("https://query1.finance.yahoo.com/v8/finance/chart/AAPL",
                 params={"range": "1y", "interval": "1d", "events": "div,splits"},
                 headers=headers)
data = r.json()["chart"]["result"][0]
# data["timestamp"] -> fechas Unix
# data["indicators"]["quote"][0] -> open, high, low, close, volume
# data["indicators"]["adjclose"][0] -> precios ajustados
# data["events"] -> dividendos y splits

s = yahoo_session()
r = s.get("https://query1.finance.yahoo.com/v7/finance/quote?symbols=AAPL,MSFT,GOOGL")
quotes = r.json()["quoteResponse"]["result"]
for q in quotes:
    print(q["symbol"], q["regularMarketPrice"], q["regularMarketChangePercent"])

s = yahoo_session()
r = s.get("https://query1.finance.yahoo.com/v10/finance/quoteSummary/AAPL",
          params={"modules": "assetProfile,financialData,defaultKeyStatistics,incomeStatementHistory,balanceSheetHistory,cashflowStatementHistory,earnings,recommendationTrend"})
fundamentals = r.json()["quoteSummary"]["result"][0]
profile = fundamentals["assetProfile"]           # sector, industry, employees, description
financials = fundamentals["financialData"]        # EBITDA, revenue, margins, ROE, ROA
stats = fundamentals["defaultKeyStatistics"]      # beta, shares, PE, PEG, short info

s = yahoo_session()
r = s.get("https://query1.finance.yahoo.com/v7/finance/options/AAPL")
data = r.json()["optionChain"]["result"][0]
expirations = data["expirationDates"]
strikes = data["strikes"]
options = data["options"][0]  # calls + puts

r = requests.get("https://query1.finance.yahoo.com/v1/finance/search",
                 params={"q": "Apple", "quotesCount": 3, "newsCount": 5},
                 headers=HEADERS)
data = r.json()
# data["quotes"] -> tickers encontrados
# data["news"] -> noticias relacionadas

# Test seguro (3 tickers, solo chart, 2 req/s)
py scripts/batch_fetch.py --tickers AAPL,MSFT,NVDA --chart --rate 2.0

# Batch completo (quote en 1 request + charts en paralelo)
py scripts/batch_fetch.py --tickers AAPL,MSFT,NVDA,GOOGL,META,AMZN,TSLA --all --rate 2.0 --workers 4

# Solo quotes (siempre 1 request, imposible rate-limit)
py scripts/batch_fetch.py --tickers AAPL,MSFT,NVDA,GOOGL --quote

# Personalizar rate + workers
py scripts/batch_fetch.py --tickers AAPL,MSFT,NVDA --all --rate 1.5 --workers 3 --range 5y